# 4 Kdenlive OS : Mac OS X , Linux , FreeBSD Supported Formats : DV / HDV , AVCHD , MPEG2 , MP4 ( MPEG4 / H . 264 ), AVI , WMV , FLV etc . Kdenlive shows excellent work on video editing based on the MLT Framework and KDE as an open-source free program . It allows users to merge a set of media including video , audio and image into a single file with customized resolution , frame rate , PAR and DAR . The multi-track editing with a timeline can be applied to an unlimited number of video / audio tracks . This video editing software for Mac also owns essential tools to create , delete , move and crop clips , while a diverse of effects and transitions for video / audio , like rotations , colors , phase and pitch shifting , volume and more are used for enriching the output file .